Strainer.



H. E. 'PAGET STRAINER.

APPLICATION FILED JULY 3.1915.

um I 9 1 00 2 y 1 H J d C t n m a 171 Fa/z 22 4 HARRY E. PAGE'I', OFCHICAGO, ILLINOIS.

STBAINER.

Application filed July 3, 1915.

T0 all/whom it may concern:

I Be it known that I, HARRY E. PAGET, a citizen of the United States,and a resident of the city of Chicago. county of Cook, and State ofIllinois. have invented certain new and useful Improvements inStrainers, of which the following is a specification.

My invention relates to improvements in strainers such as are used inconnection with steam, water or other fluid pipes. to strain the fluidpassing therethrough and thus pre ventthe entrance of foreign matterinto the machine. device or apparatus with which the' pipe. in which thestrainer is employed, communicates.

The object of my invention is the production of a strainer of thecharacter mentioned which will be of durable and economicalconstruction. one which may be readily and easily installed. one whichwill permit of ready cleaning of the same, that is of ready removal ofthe foreign matter collected thereby, and one which will be highlyeflicient in use. 1

Other objects will appear hereinafter.

'ith these objects in view,the invention consists in the combinationsand arrangements of parts hereinafter described and claimed.

The invention will be best understood by' reference to the accompanyingdrawing forming a part of this. specification, and in which,

,Figure 1 is a central section of a strainer embodying the invention,showing the same arranged in a pipe, and i Fig. 2 is a view similar toFig. 1 of another form of construction. wThe preferred form ofconstruction, as illustrated in the drawing, comprises a tubular body 1the opposite ends of which are screw-threaded for connection with theends of the pipe 2 in connection with which the strainer is e'mplo'ed.The body 1 is formed at one side with an angularly disposed portion 3 inwhich is mounted a straining element 4. Said straining element is oftubular formation and slightly tapering toward its outer end. the samebeing formed of a plurality of telescoping sections, as clearly shown inFig. 1. One end of the straining element 4 rests in an annular groove orseatv5 formed for the reception thereof in the body 1 the opposite endof said straining element engaging against a plug 6 which is threaded inthe outer end of Specification of Letters Patent.

Patented July 23, 1918.

Serial No. 37,964.

portion 3. The plug 6 is formed with an exteriorly positioned portion 7which may be engaged by a wrench or other tool for rotating the same.Said plug has an axial passage formed therethrough and a drain orblow-off valve 8 is connected with the outer end of said plug in opencommunication with said passage. The inner end of plug 6 or the portionthereof engaged by the outer end of straining element 1 is formed with acurved seat 9, the curvature of said seat being comparatively gradual,as clearly shown in Fig. 1, so that in adjusting the plug 6 intoengagement with said straining element, in the event of too greatpressure being applied by the plug upon the straining element, thelatter instead of being crushed by this pressure will bend inwardly atits outer end to conform with the curvature of seat 9. Also, with thisarrangement, it will be seen that an exceedingly tight joint will beformed between the straining element and the seat 9, since the area ofthe contacting surfaces at this point is comparatively great. Throughthe sectional construction of the straining element. resulting in doublethicknesses at intervals where the sections overlap, reinforcementresults at these points which necessarily lends strength and rigidity tothe construction.

In use, the,steam, water or other fluid is introduced to the body 1 asindicated by the arrows. Upon entering the device, the fluid passes intothe straining element and thence through the perforations therein,entering an annular space 10 formed around said element, the fluid beingfinally discharged from the device by passage through the exit port 11,as will be readily understood. The circular wall of the space 10 isbulged at its center as seen, in order to allow for a larger quantity offluid being accommodated at the central portion of said space than atthe ends thereof. This is of advantage since the'outlet port ll leadscentrally from the space 10 and necessarily the central portion of saidspace will be taxed the greatest in the flow of fluid into said port 11.In the passage of the fluid through the straining element, it is ofcourse apparent that any solid foreign matter will be retained in saidstraining element. In order to remove the foreign matter thus collectedin the strain ing element it is only necessary to open the valve 8,since upon so doing, it will be seen, that the flow of the fluid intothe device will carry the foreign matter collected in the strainingelement out through said valve. Through the annular disposition of theportion 3 a substantially straight-away construction is provided, or onewherein the.

flow of the fluid through the pipe 2 will not be retarded at thestraining element, such as results in devices of this character in useat the present time Where the fluid is required topass around a sharpbend or back upon itself in passing through the straining element.

Also, the straining element, in the pres ent construction, is of suchsize or proportions that the area of the same is several times that ofthe inlet or outlet to and from the body 1 which permits the use of verysmall perforations in said straining element without checking the flowof fluid in the least. Through the tapering construction of 'thestraining element, the pressure of the fluid entering the strainingelement will be distributed along the entire length of said strainingelement which will thus assume a considerable portion of the strain orpres sure which otherwise would be directed against the plug 6 were acylindrical straining element employed or one where the sides thereofwould offer no resistance to the incoming fluid. Moreover, the taper-.ing formation of the straining element 4 facilitates the removal ofthesame from the portion 3 When the plug 6 is detached, it being clear thatwere said straining element of uniform diameter throughout and of a sizeonly slightly less than thediameter of the opening at the outer end ofsaid por tion 3, removal of said straining element would be moredifiicult.

In the form shown in Fig. 2, the body 1 of the straining element isformed for connection with pipes disposed at right angles to each other,said strainer body being adapted to be substituted for the ordinary pipeelbow. In this construction the relative positioning of the portion 3 issubstantially the same as above described, the straining element 4:which is arranged therein being, however, of a one piece constructioninstead of sectional. Said straining element is interposed between seats5 and 9 formed respectively in the body 1 and the plug 6'. In thisarrangement, the

' seat 9 which is formed in the plug 6 is .the scope of the appendedclaims.

the same as the seat 5 being simply an annular groove adapted to snuglyreceive the end of the straining element. The outer end 7 of the plug 6with this construction, however, is of the same formation as that of theplug 6 and a strainer or blow-out valve 8 is connected therewith in thesame manner, as above described. The operation of the form shown in Fig.2 is precisely the same as that above described, the differences inconstruction in no way affecting the operation.

While I have illustrated and described the preferred forms ofconstruction for carrying my invention into efl'ect, these are capableof variation and modification Without departing from the spirit oftheinvention. I, therefore, do not wishto be limited to the precise detailsof construction set forth, but desire to avail myself of such variationsand modifications as come within Having described my invention What Iclaim as new and desire to secure by Letters Patent is:

1. A strainer comprising a hollow body; a tubular perforated strainingelement open at both ends mounted in said body through elementconsisting of a plurality of tubular sections, the adjacent ends ofwhich are overlapped, substantially as described.

2. A device of the class described compris ing a hollow body having aninlet and an outlet and provided with a strainer chamber incommunication with said inlet, the end of said chamber adjacent saidinlet being provided with an annular seat and the outer end thereofbeing open and threaded, a plug threaded upon the open end of saidchamber and provided with a discharge cock, and a conical'strainerelement. formed of a plurality of sections with overlapping edges, saidstrainer element having its base resting against said seat, and itsopposite end engaged by said threaded plug, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses. A,

HARRY E. PAGET.

Witnesses:

- JOSHUA R. H. Po'r'rs,

HELEN F. LILLIS.

